用所给单词的正确形式填空。

1. What are you _____________ (go) to do?

2. She is going to _____________ (read) a comic book tonight.

3. What _____________ (do) she like?

4. He often _____________ (help) people.

5. I often _____________ (ride) my bike.

6. She likes _____________ (draw) pictures.

7. He lives on the _____________ (five) floor.

8. Where _____________ (be) he?

9. I _____________ (teach) English.

10. The rain _____________ (come) from the clouds.

我国藏族的医术称为藏医，藏医尤精于生理解剖。盛唐时，吐蕃已明确脑部所发出的“白脉”支配全身，并且知道血脉有动、静之分。当时藏医已经发现人类胚胎发育在38周内经历鱼、龟、猪、人四个过程。这种重演生物进化史上的鱼纲、爬行纲、哺乳纲三阶段的胚胎学识，为世界中世纪史上所仅有。
这段文字意在强调( )。

A．藏医发展与胚胎学知识密切相关
B．藏医具有十分悠久的历史传统
C．藏医在盛唐时期水平世界领先
D．藏医具有丰富的生理解剖知识